下面是官方文档对于@responsebody注解的解释：
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mapping the response body with the @responsebody annotation
the @responsebody annotation is similar to @requestbody. this annotation can be put on a method and indicates that the return type should be written straight to the http response body (and not placed in a model, or interpreted as a view name). for example:
@requestmapping(path = "/something", method = requestmethod.put)
@responsebody
public string helloworld() {
return "hello world";
}
the above example will result in the text hello world being written to the http response stream.
as with @requestbody, spring converts the returned object to a response body by using an httpmessageconverter. for more information on these converters, see the previous section and message converters.
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@resopnsebody注解能够 直接把 控制器返回变量（string）直接 返回给浏览器,也可以通过配置 后，把 对象 序列化成json数据返回给浏览器！如果为 null 就会返回空白。
怎么配置呢 ？需要配置messageconverter:
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<bean
class="org.springframework.web.servlet.mvc.annotation.annotationmethodhandleradapter">
<property name="messageconverters">
<list>
<ref bean="mappingjackson2httpmessageconverter" />
</list>
</property>
</bean>
<bean id="mappingjackson2httpmessageconverter"
class="org.springframework.http.converter.json.mappingjackson2httpmessageconverter">
<property name="supportedmediatypes">
<list>
<value>text/html;charset=utf-8</value>
<value>text/json;charset=utf-8</value>
<value>application/json;charset=utf-8</value>
</list>
</property>
</bean>
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下面贴出在官方文档中的位置：
这个需要jackson jar包支持，需要 jackson-annotations,jackson-core,jackson-databind三个包，：
控制器代码：
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@requestmapping("house/classmanager/addbyajax")
@responsebody
public hanblog_class classmanager_addbyajax(httpservletrequest request){
if(request.getsession().getattribute("hanblog_uid")==null) return null;
hanblog_class objclass=new hanblog_class();
return objclass;
}
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jquery代码：
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//|增加
$("#hanblog_add_btn").click(function(){
var classname=$("#add_input_name").val();
var classintroduction=$("#add_input_introduction").val();
alert("分类名称:"+classname+"分类介绍:"+classintroduction);
$.get("<c:url value="/house/classmanager/addbyajax.do" />",function(result){
alert(result);
});
});
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运行返回例子：
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持服务器之家。
原文链接：https://blog.csdn.net/u012997311/article/details/51982461